Combination heating apparatus



J; DBMAREST. COMBINATION HEATING APPARATUS.

(No Mogel.)

Patented May 28, 1395-" 2 I e al me mums Patins cri, wno'znnno. wnswmmfon4 n. c.

NITED VSTATES PAT'NT OFFICE.

JOHN DEMAREST, or MALDEN, MASSACHUSETTS.

COMBINATION HEATING APPARATUS.

. PLEGIFIGA'JTION forming part of Letters Patent No. 539,978, dated May 29, 1895.

' Application iledduly 16, 1894- Serial No. 517,635. (No model.)`

To @ZZ lol-1,0m it may concern.-

Be it 'known that I, JOHN DEMAREST, o

Malden, county of Middlesex, State of Massagenerating the steam, or warming the water,

is arranged within the usual domeconstituting the heating chamber, and adjacent or immediately over the fire pot.

Prior to my invention it has been the usual practice to employ the common form of vertical fire tube boiler, arranged immediately .above the fire pot, the products of combustion from the latter passing through the vertical tubes in the boiler and nding their exit from the sides of the dome near the crown of the latter and above the said boiler. To improve heaters of this type I wish to employ a water tube boiler, preferably of the drop tube type, wherein the products of combustion after circulating among the water tubes are caused to pass to the sides of the boiler and around the top header to the smoke exit above the boiler. It is desirable that the products of combustion pursuing the course described,

be again drawn in or wrapped over and in bers above, thereby creating an element of great danger. To overcome this difficulty,

` and still preserve the centrally located smoke exit, my present invention comprehends leading said exit from the point named down the side of the dome or heating chamber, to the bottom of the heater and preferably into a suitable combined radiator and Hue encircling'the lire pot. In this way the advantages of thecentral exit at the top of the heating chamber are retained, and also such as attend .the use of the radiator referred to, without the danger which attends the leading of the smoke exit directly up from the top of the heating chamber.

My invention further comprehends a series of retarding plates in and depending from the top of the radiator or Hue referred to, the successive plates from the inlet to the exit ends of said radiator dropping -lower than the preceding ones'to thereby produce a substantially uniform retarding effect throughout the length of the radiator or fiue. A

Still another feature of my invention consists in providing the radiator referred to, which, so far as this feature of my invention f is concerned, constitutes one form of conduit through which products of combustion are passed, with a permanent cleaning device, meaning by'permanent, one which alwaysremains in operative position within the flue or radiator, suitable means being provided by which to draw this cleaning device in one or the other direction through the said conduit to remove the soot and ashes therefrom.

Other features of myinvention will be hereinafter described and particularly pointedout in the claims.

Referring to the drawings, Figure l, in ver' tical section, shows a preferred form of heating apparatus embodying my invention, the outer inclosing-case being indicated in dotted lines; Fig. 2, a horizontal section taken on the dotted line a: Fig. l; and Fig. 3, a detail showing a portion of,.and looking at the side of, the radiator and partially broken away to A is a suitable irepot,. forming the combustion chamber, and mounted in a suitable manner upon the top of the base casting B, con? I base ring a, which in turnsustains the cylindrical side sheet d of lthe dome D, preferably provided with a convex crown d. W'ithin this dome D, which constitutes the preferred form of heating chamber, I have arranged a water tube boiler E, shown as of the drop tube type, and comprising the body vportion or header e, from which depend the tubes e screwed into or otherwise suitably attached to the tube sheet. The header e is supported in a suitable manner, the same being herein shown as suspended by the outlet pipes e? from the crown d of the dome, The drop tubes c may be simple tubes, as shown, vor they *may be otherwise constructed in accordance with well known practice in drop tube yboiler construct-ion at the present time.

To provide a means for draining the drop tubes, myinvention comprehends closing the lower ends of the same in asuitablc manner, as by screw plugs e3, which may be removed when it becomes `necessary or desirable to drain the tubes.

The inlet pipe for the boiler is shown l=at e, the same constituting fpreferably the return pipe for the system.

F isa semi-circular radiator, preferably rectangular in cross-section,` as shown, and encircling the fire-pot, the same, as shown, having its ends closedby'rcmovable plates vor coversf,f. See Fig. 2.

The products of lcombustionfrom thelire pot rise'and circulate among thedrop tubes of the boiler,`and rare deliected by the tube sheet thereof outwardly to the sides of the dome, passing thence 'up to the top of the dome'to the entrance h 4of the smoke exit flue h', which leads down, herein Aalong the inside of lthe dome, lto and preferably enters the radiator F, as bestshown in Fig. l, the 'said flue, as shown, entering theradiator, near one end of the latter, so that the products of vcombustion will pass along the entire length of the radiator vto the exitf, at or near the opposite end thereof, see Fig. 2, which exit enters the end of the vertical funnel f2 leading to the uptake or chimney. A direct draft passage]c3 leads from theside of and near the top of the dome to thesaid vertical funnel f2, which passage is controlled 4lo the usual damperf4.

Vithin the radiator `F `andyas shown, depending from the top thereof I have arranged a series ofplates f5 shown as graduated, that is, depending each lower than the preceding one, from the entrance to the exit of the said radiator, in order that the products of combustion inpassing therethrough' shall be retarded.

Within the radiator F, I have-also 'arranged the cleaner m'adapted to remain. permanently within the same, `and which when vdrawn through said radiator acts topushA before it the soot or ashes accumulated therein. Asa means for moving this cleaning device I'prefer to employ two flexible connections, as chains fm', connected to opposite sides of the same, as best sho-Wn in Fig. 2, which chains are-each of sufficient length tol extend completely around or through the radiator, and at their ends may be connected, as shown, to the coversf,f,at the ends of the radiator, or left loose within the latt r. The normal pos-ition ofthe cleaning device is preferably at one end of the radiator, that is, between the `'radiator end and the inlet or exit thereof, so that it will not interfere with the passage of the products of combustion therethrough.

When it is desired to remove the ashes from the radiator one of the coversf at the opposite end from that at which the vcleaning device is located, is removed, the same forming a handle by which, through .the chain m', the cleaning device may be drawn through the entire length of ythe radiator to remove the ashes, as described.

The dotted lines n represent the outer inclosing shell creasing, usually of sheet iron, from-which lead the usual warm air pipes 'n' tothe registers in the doors of the rooms to be heated. The outlet pipes c2 for the boiler lead to the radiators in the rooms to beheat-ed by the same.

The products of combustion passup at the sides ofthe boiler header @and are wrapped over the crown sheet thereof, being gathered in kbetween said crown sheet and the crown of the dome, and in contact with the former by and'to the centralexit h, so that the products of combustion reach and contact with the boiler on all sides before passing from the dome, yet the said products are'conducted to the bot- IOC tom of the heater, to permit the use of the -meritorious ,construction of radiator and direct and indirect drafts to be employed.

The boiler may be used for raising the temperature of Vwater in a hot water system, or lfor the generation ofr steam ina steam system,

as may be found most desirable.

It is essential in my invention that the boiler `be arranged within thedome of the combustion chamber, with its top or crown sheet in substantially close proximity to the crownofy the said combustion chamber in order that the products of combustion, when drawn or wrapped in over the crown sheet of the boiler to the centrally located exit flue, may contact with the said crown sheet and impart heat therethrough to the water in the boiler. Were the boiler dropped away from the crown of the combustion chamber or dome, theflames would pursue the most direct path from the sides of the boiler to the vcentrally located exit, and would, therefore, not come into direct contact withA the crown Asheet ofthe boiler. This location of the boiler is further necessary, as a boiler, as distinguished from a water-coil or other similar device, cannotbe crowded vdown too close upon -the fuel in the fire pot, but must be located IIO clude its use in the ordinary cellar or 'basement. f z

My'invention is not necessarily restricted to the particular arrangement and construction of the various parts herein shown, for the same may be varied without rdeparting from the spirit and scope of my invention.

Having described my invention, and without limiting myself as to details,what I claim, and desire to secure by Letters Patent, is-

I. A combination heater, comprising a combustion chamber, a fuel support therefor, a heating chamber, a water boiler arranged within said heating chamber and having its topsheet in close proximity to the crown thereof, a smoke exit confined within the upper portion of the heating chamber and'beneath its crown and having its entrance arranged centrally of the heating chamber, to thereby draw togethervthe products of combustion over and in contact Withthe top sheet of the boiler, said products of combustion being crowded down upon said top sheet by the proximity of the crown of the heating chamber, the said smoke exit leading outwardly from below the crown of the heating chamber, whereby a central exit for the products of combustion is obtained without leading the same from the top of the heater near the floor timbers, substantially as described.

2. A combination heater, comprising a combustion chamber, a fuel support therefor, a heating chamber, a water boiler arranged within the heating chamber and having its top sheet in close proximity to the crown thereof, a radiator outside of and adjacent said combustion chamber, and a smoke exit confined within the upper portion of the heat- .ing chamber and beneath its crown and having its entrance arranged centrally of the heating chamber, to thereby draw together the products of combustion over and in contactwith the top sheet of the boiler, said products of combustion being crowded down upon said top sheet by the proximity of the crown of the heating chamber, the said smoke exit leading .outwardly from below the crown of the heating chamber and com municating with said radiator, and an outlet for said radiator, substantially as described.

3. A combination heater, comprising a combustion chamber, a fuel support therefor, a y

heating chamber, a Water boiler arranged within the heating chamber and having its top sheet in close proximity to the crown thereof, a radiator outside of and adjacent said combustion chamber, a smoke exit confined within the upper portion of the heating cham.

` ber and beneath its crown and having its entrance arranged centrallyof the heating cham-` ber, yto thereby draw together the products of combustion over and in contact with the top sheet of the boiler, said products of cornbustion being crowded down upon said top sheet by the proximity of the crown of the Y heating chamber, the said smoke exit leading outwardly from below the crown of the heatingc'hamber and communicating with said radiator, an outletl for said radiator,and an inclosing shell or casing provided with hot air exits, substantially as described.

4. In a heating apparatus, the combination with a segmental smoke conduit, having openings at its opposite ends and closures therefor of a cleaning device permanently located in said conduit, and operating connections leading from thesaid cleaning device in opposite directions to the ends of saidconduit and furnishing means by which to draw the said cleaning device through the said conduit in opposite directions to remove ashes, &c., therefrom, substantially as described.

5. In a heating apparatus, the combination with a smoke conduit, of a cleaning device permanently located therein, and flexible connections permanently attached to and furnishing means by which to draw the said cleaning device through the said conduit, substantially as described.

6. In a heating apparatus of the class described, the combination with aV radiator, as F, and a cover closing one end of the same, of a cleaning device arranged within the said radiator, and a flexible connection joining the same to the said cover the latter furnishing means by .which to drawthe cleaning device through the radiator, substantially as and for the purpose specified.

7. In a heating apparatus of the class described, a radiator, as F, through which "the products of combustion pass combined with a series' of retarding plates arranged therein,

,and at substantially right angles to the direcname to this specification in the presence of two subscribing witnesses.

JOHN DEMAREST. Witnesses: FREDERICK L. EMERY, EMMA J. BENNETT.

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